Metal bellow valve



FIG. 1 is a front perspective view of the metal bellow valve;

FIG. 2 is a side elevational view of the metal bellow valve;

FIG. 3 is a top elevational view thereof; and,

FIG. 4 is a bottom elevational view thereof.

The portions of the metal bellow valve shown in FIG. 4 in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a metal bellow valve, as shown and described. 